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Note 4 - Accounts Receivable (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

June 30,

  

December 31,

 
  

2023

  

2022

 
         

Accounts receivable

 $3,802,570  $2,096,569 

Allowance for credit losses

  (623,785)  (573,785)

Accounts receivable, net of allowances for credit losses

 $3,178,785  $1,522,784